How many watts does a gaming monitor use: Top Power Guide

Most modern 24- to 27-inch gaming monitors draw roughly 25 to 50 watts while switched on, although the exact figure depends on screen brightness, panel technology, resolution, HDR, and connected devices. If you’re asking how many watts does a gaming monitor use, that range is a practical estimate, not a guaranteed rating for every model. A 27-inch OLED monitor may use around 30–55 watts in typical gameplay, while a large 4K display can consume considerably more during bright scenes. The most reliable answer comes from your monitor’s power specifications or a measurement taken directly at the wall outlet.

How many watts does a gaming monitor use?

A gaming monitor typically consumes tens of watts rather than hundreds during normal operation. For many 24- to 27-inch models, approximately 25–50 watts is a useful starting point when estimating electricity use. Larger displays, high-brightness models, and some HDR-capable monitors can draw more.

Manufacturer specifications and independent measurements illustrate why there is no single wattage for every gaming display.

These figures come from different models and measurement methods, so they should not be treated as a controlled comparison. They show the difference between typical use, a rated maximum, and consumption measured under particular brightness or image conditions.

For everyday planning, use the typical consumption rating when the manufacturer provides one. If only a maximum rating is listed, treat it as a conservative specification rather than the amount the display will draw continuously.

Typical wattage by monitor size and display technology

Screen size offers a useful starting point, but it does not determine power consumption by itself. Two displays with the same diagonal measurement may use different panels, resolutions, backlights, and brightness settings.

These are approximate planning ranges, not guaranteed measurements or specifications for every monitor in each category. The larger-screen estimates are especially broad because monitor size alone does not account for brightness, backlight design, or panel efficiency.

How many watts does a gaming monitor use during gameplay?

Gaming does not produce a fixed power draw. The monitor may consume a different amount when displaying a dark game environment, a bright snow-covered landscape, a white menu, or an HDR explosion.

Independent testing of the 27-inch Titan Army G2785S QD-OLED, for example, reported approximately 30–40 watts for SDR gaming at a specified brightness level and around 40–55 watts for HDR gaming. A separate test of the 42-inch KTC G42P5 OLED recorded approximately 50 watts during mixed browsing and video playback at its default brightness setting, with higher consumption at maximum brightness and peaks reaching 126 watts.

Those findings demonstrate two useful principles. First, a monitor’s consumption can change while you play the same game. Second, one measurement from a specific monitor and test setup should not be presented as the power consumption of all gaming monitors.

For a more reliable estimate, use the manufacturer’s typical rating or measure your own monitor during the types of games and settings you normally use.

What affects a gaming monitor’s power consumption?

Several factors influence how much electricity the display draws. Some are more important than the refresh-rate number printed on the product box.

Screen size and resolution

Larger screens generally need more energy because they have a greater display area to illuminate. Higher resolutions also involve more pixels and display-processing work, although the relationship is not perfectly proportional.

A 32-inch 4K monitor may use more power than a 24-inch 1080p model, but the comparison depends on the panel, backlight, brightness, and features. You cannot reliably calculate wattage by multiplying the screen size or pixel count.

If energy consumption matters to your purchase, compare monitors of similar size and intended use rather than assuming that every lower-resolution display is automatically more efficient.

Brightness and HDR

Brightness is one of the most practical settings to check. Increasing the backlight level on an LCD monitor generally increases its power consumption. High brightness can also make a difference when using HDR, which allows compatible displays to produce bright highlights beyond their usual SDR presentation.

OLED works differently because its pixels emit their own light. Bright scenes with many illuminated pixels can draw substantially more power than predominantly dark scenes. The effect depends on the panel and how the monitor manages brightness.

For example, Notebookcheck measured its 27-inch KTC H27P22S IPS monitor at about 32 watts with brightness set to 50%, compared with roughly 43 watts at 90%. That is a model-specific measurement, but it illustrates why a manufacturer’s maximum rating will not necessarily match everyday use.

Panel technology

IPS, VA, and OLED panels use different approaches to producing an image, so their power consumption patterns differ.

• IPS and VA gaming monitors generally use an LED backlight. Power draw is influenced by the backlight’s brightness and the rest of the display electronics.

• OLED monitors illuminate individual pixels. Dark content may require less power than bright, predominantly white content.

• Mini-LED monitors use many small backlight zones. Their energy consumption depends on the panel, backlight controls, brightness, and displayed content.

No panel technology is always the lowest-power option. The exact model and operating conditions matter more than a broad label.

Refresh rate and gaming features

A 240Hz or 360Hz gaming monitor may draw more power than a comparable model operating at a lower refresh rate, but refresh rate alone does not provide a dependable wattage estimate.

Features such as HDR, local dimming, built-in speakers, USB hubs, and other electronics can also affect the overall draw. Some monitors support USB-C power delivery, which allows the display to supply power to a laptop or connected device. That added load can raise the total electricity drawn from the wall.

For a meaningful comparison, check the specifications for the exact monitor and note whether the stated power consumption includes additional powered devices.

How to calculate a gaming monitor’s electricity cost

Watts measure the rate at which a device uses power. Electricity consumption over time is measured in kilowatt-hours (kWh), which is the unit commonly used on residential electricity bills.

Use this formula to estimate how much electricity a monitor consumes:

Monthly energy use (kWh) = (Watts ÷ 1,000) × hours used per day × days per month

To estimate the cost, multiply that energy use by your electricity rate.

Monthly cost = monthly energy use (kWh) × electricity price per kWh

Example: monthly cost of a 40-watt gaming monitor

Suppose your gaming monitor draws an average of 40 watts and you use it for eight hours each day.

• Power consumption: 40 watts, or 0.04 kilowatts

• Daily use: 8 hours

• Monthly use: 30 days

• Electricity rate: $0.16 per kWh, used here as an illustrative assumption

The calculation is:

0.04 kW × 8 hours × 30 days = 9.6 kWh per month.

At $0.16 per kWh:

9.6 kWh × $0.16 = $1.536 per month.

That works out to approximately $1.54 per month or $18.43 per year if consumption and the electricity rate stay constant.

Your actual cost may be higher or lower depending on your local electricity rate, usage, brightness, and the monitor’s average power draw.

These calculations cover the monitor alone. They do not include your gaming PC, console, speakers, desk lighting, or other accessories.

If your electricity bill includes variable delivery and supply charges, use an appropriate all-in per-kWh rate for a more realistic estimate. Fixed monthly fees generally should not be added to the monitor’s marginal operating cost because you would typically pay them regardless.

How to check your monitor’s actual wattage

Manufacturer specifications are a good starting point, but a direct measurement is more useful when you want to estimate real electricity costs.

Check the manufacturer’s power specifications

Find your exact monitor model and look for its specifications or user manual. Power information may be listed under headings such as Power Consumption, Typical Power Consumption, Maximum Power Consumption, Sleep Mode, or Standby.

The distinctions matter:

• Typical power consumption is a reference for normal operation under the manufacturer’s specified conditions.

• Maximum power consumption indicates an upper operating figure under the conditions defined by the manufacturer.

• Sleep or standby consumption refers to a low-power state when the monitor is not actively displaying content.

For instance, LG lists 36.7 watts typical and 94 watts maximum for its 27-inch UltraGear 27GR95QE-B OLED gaming monitor. Those two figures describe different operating conditions; neither establishes the monitor’s precise consumption in every game.

Use a plug-in power meter

A plug-in electricity meter is a practical way to measure how many watts your monitor draws from a wall outlet. Connect the monitor’s power supply to the meter, then plug the meter into the outlet according to its instructions.

For a useful reading:

1. Set the monitor to your normal brightness and refresh rate.

2. Use it for your usual gaming or desktop activities rather than measuring only the startup screen.

3. Record the wattage during several representative scenes.

4. Check the meter’s accumulated kWh reading over a typical day if it supports energy tracking.

This method measures the power drawn from the wall, including the power supply’s conversion losses. If you use a USB-C connection to charge a laptop or power other devices through the monitor, the measurement may include that extra load as well.

Avoid comparing one monitor’s measured wattage with another manufacturer’s rating unless the operating conditions are reasonably similar.

Ways to reduce a gaming monitor’s power consumption

You do not necessarily need to sacrifice your preferred gaming experience to reduce electricity use. Start with changes that have little effect on performance.

Lower brightness to a comfortable level

Reducing brightness is often the easiest step, especially on LCD monitors. Try a moderate brightness setting and increase it only when your room lighting requires it.

Avoid setting the display so dim that you struggle to see dark details in games. The goal is to use only as much brightness as you need.

Enable automatic sleep and power-saving settings

Configure your operating system and monitor to turn off the display or enter sleep mode after a period of inactivity. ENERGY STAR recommends using monitor sleep settings to limit wasted energy when the screen is not needed.

This is particularly useful if you leave your desk frequently or keep your computer running overnight.

Use HDR when it improves the experience

HDR can improve supported games, but it is not necessary for every task. On some monitors, HDR operation can increase power consumption, especially in bright scenes. Switch between HDR and SDR based on the content you are viewing and your preferences.

Do not assume that turning HDR off will always save a specific amount of electricity. The result depends on the monitor and its settings.

Avoid unnecessary powered accessories

A monitor’s built-in USB hub, connected peripherals, and USB-C charging can contribute to its overall power draw. Disconnecting unused accessories or charging devices separately may help when those features add a meaningful load.

However, there is little reason to disable useful features solely to save a negligible amount of electricity. Check the actual difference before deciding which conveniences to give up.

Choose an ENERGY STAR-certified model

ENERGY STAR-certified monitors meet specified energy-efficiency requirements for operating, sleep, and off modes. The program reports that certified monitors are, on average, 7% more energy-efficient than standard options.

Certification is a useful comparison point, but it does not guarantee that one certified gaming monitor will consume less power than every non-certified model. Compare the individual specifications and available operating-mode data when efficiency is a priority.

Frequently asked questions

Does a higher refresh rate use more electricity?

It can. A high-refresh-rate display may consume more power than a comparable model at a lower refresh rate, but the difference varies by design. Brightness, panel technology, and other features also influence consumption, so do not estimate wattage from refresh rate alone.

Does a gaming monitor use power when turned off?

It may. Some monitors continue to draw a small amount of electricity in standby or off mode, depending on their design and power settings. Disconnecting the power supply stops the monitor’s standby draw, but using automatic sleep settings is usually more convenient.

Is a 180-watt power adapter using 180 watts?

No. A power adapter’s wattage rating indicates its capacity, not the amount of electricity the monitor continuously consumes.

For example, CORSAIR lists 34.81 watts of on-mode power consumption for its XENEON 27QHD240 OLED while specifying a 180-watt power adapter. The adapter’s rating should not be mistaken for the display’s normal operating draw.

Do two gaming monitors double electricity consumption?

Not necessarily in every usage scenario, but two identical monitors operating under the same conditions will generally use about twice the power of one. For example, two displays drawing 40 watts each would consume approximately 80 watts combined.

You can estimate their combined monthly energy use by adding their wattage together before applying the electricity-cost formula. Different resolutions, brightness levels, and panel technologies can produce different results.

Does a gaming monitor use more electricity than a gaming PC?

It depends on the components and workload. A monitor drawing 30–50 watts typically uses far less power than a gaming desktop drawing several hundred watts under a demanding gaming load. However, a large or high-brightness display can draw more than a smaller monitor.

To calculate the cost of your entire setup, measure the PC and monitor separately or use a suitable meter to measure their combined draw at the wall.

Conclusion

Most modern 24- to 27-inch gaming monitors use roughly 25–50 watts during operation, making that a reasonable starting point for estimating electricity costs. Larger displays and some OLED or HDR gaming monitors can consume substantially more, while actual wattage changes with brightness and content. For an accurate estimate, check the manufacturer’s typical power rating or measure your monitor with a plug-in power meter. Multiply its average wattage by your daily usage and local electricity rate to estimate the cost. This gives you a more useful answer than relying on the power adapter’s maximum rating alone.